Extensible cake pan



Feb. 10, 1953 M. DANzlGl-:R

EXTENSIBLE CAKE PAN 5 Sheets-Sheet 2 Filed Aug. 5, 1949 INVENTOR. MANFRED DANZIGER 7/441 4 I TQNEY Feb. 10, 1953 M. DANZIGER 2,627,801

EXTENSIBLE CAKE PAN Filed Aug. 3, 1949 `.'5 Sheets-Sheet 3 INVENTOR.` MANI-yo DANZIGER A TToQA/EY Patented Feb. 10, 1953 UN IT E STAT E S PAT ENT OFFICE EXTENSIBLE CAKE' PAN Manfred .Danziger,zNewarlr,N. Application August 3, 1949, SeraINo. 1082286* (Cl. SBF-435.1);

2 Claims'.

The present invention deals-with cake pansh and more specifically is concerned.' with extensible cake pans.

Extensible cake pansrectangular orroundare known in the art. Their'purpose is to make possible the use of one pan for the baking of cakes of various sizes, i. e. to minimize the number of cake pans recluiredin the average household and yet' make possible the baking of a plurality of -cake sizes.

The principal shortcoming of such extensible pans, which by necessity,y inherent in their purpose, must be constructed in sections, has been the complicatednature of their locking devices, i. e. the means employed to hold the sections and parts in place on assembly to the desired size. Thus, prior devices have employedl special loops or bands, turn buckles, etc. to interlock the parts involved. The home, for which such pans are intended, is, however, not a suitable placefor the operation of such devices and, furthermore, some ofthe locking meansr are in the way of. and prevent. encient and clean utilization of suchpans. For, these and other reasonsthe useof such. extensible pans has notk been accompanied by success.

It is one objectof this invention to. provide an extensible baking, pan, for the baking of cakes, which shall besimpleand efficient. It isanother object oflthisinvention to. provide such adjustable. bakingv pan with.. a .minimum of, parts. and which shallbe easy to manufacture andlprodue in quantity. It is a further obj,ect a prime object, to provide suchcake. baking pans wherein the various sections or parts are held together and iuterlocked in. a. simple and. eicient.'y manner. Other, objects andV advantages-of. my invention willappear from the description Vthereof herein.- after following.

My invention isy illustrated inthe drawings, forming part hereof, in which Fig. 1. represents an elevational perspective view of one embodiment of the invention, partly in exploded View,

Fig. 2 represents aibottomlplan View oi-the embodiment ofFig. 1,

Fig. 3 is aseotional View on, the line 3.-3 of Fig. 2,

Fig. lV isa sectional Viewv on the. line. 4-4/of Fig. 2,

Fig. 5 represents, in elevational perspective view, the sidewall ofv another embodimentlof the invention,

Fig. .6l represents a .cross-sectional viewy of part of Fig. 5,

Fig; '7' representsatop-plan:viewfofpart'offthe bottom forthe wall of CFig- 5 Fig.y '7uA represents a top Yplan viewfof'fpartiof fthe bottom, in modiedfform, for'the wall`1ofFi'g; 5,

Fig- 8 representsV a cross-sectional` viewVy along theline-E of Fig. 7,

Fig. 9^represents a'v cross-sectional viewf along the line Si--SJ of Fig'. 7a, andv Fig. 10 represents a wall'locking ydevic'e'for-th'e embodiment'oFigs. 5L9".

Referring to Fig. 1, the panI is' forzn'edof two sections' l and V 2, open at one'fend; adapted' to telescopeintoeach other. Sectionv Tis-shown; of slightly largerr` diameter and is` designed., on telescoping', to"encompasssectionv I on itsfsidean'd along part of'its length. Each section-is provided with a beaded or curled rimv 3' andY 3'; respectively, likewise designed to` telescope` one into` theother. As. shown, the larger dimensioned section" 2 has a small. and narrow rim. 3' designedJ to'- t' into the. larger and" wider,` rim: 3 of' the* smaller dirnensioned sectionVV I. For this reason both rims are folded over; atleastA the Wider'rim, 3f, forming a tube, open at its bottom near-thewall'to permit the telescoping entrancev of the narrower rim which" alsoY may beifolded over,` or be solid, as desired. The two beaded rimsareso formedand dimensioned that they,` are inh tight Aand snug nt. At least the'Y rim 3' is'open along-the-lower'edge so as to be able to receivetherewithin the'rim'3". The bent-over rims 3 and" 3f' extendalong the entire upper. edge of the' sections l and 2, thus contributing to the rigidity' of'thev na'l device. The, contactofjrim f withinrim 3 is. one..l of hrm friotional' t.

The bottoms ofthe two telescoping overlapping sections are interconnected' by a series of'button's as showninligs. 2`4 In the embodiment-shown Vthere are three such buttons'although ofcourse a greater or lesser (but not less than two) number may be employed. The, smaller section encompassedby and .overlying` section 2', is thusiprovided with .upwardly curved'ridges' 4", 4""and 4f". andthelarger. encompassing section 2 is provided withflikeupwardlycurvediridges 5' (and .5. andi',

- not. shown) correspondingto. the ridges oflthe othersection 2. The ridges .are so designedas to rl't.; very each other, as shown in moreV detail in Figs. 3 andl 4', in light. f'ri'ctional ft',` to.v form localized .friction areas...

The. buttons may havev acircular or any other shape, although it' hasv been found that `an clone gatedlshape, .as shown in. the drawingsgespecially Eig. 4,..i"s,-.most advantageous, theY longer.' diameter being in the direction of the traveof'the two body sections land 2, as shown, so as to create a strong friction area in the direction in which on telescoping of the sections the greatest force is applied.

Advantageously the bottoms of sections I and 2 are each provided with a central, longitudinal channel 6 and l. These channels serve to rigidify the sections along their longitudinal dimension. Any other rigidifying structural feature, e. g. one or more corrugations, may, of course, be used. Such rigidifying means extends, preferably, along at least the major part of the length of each section, Preferably, the local friction areas, e. g. buttons Ii and 5, are, as shown, arranged along the rigidifying channel. Also, it is advantageous that the rigidifying means of sections I and 2 are in intimate contact along their length, as shown.

The action of the rims 3 and 3' combined with that of the friction areas formed by the ridges 4 and 5 provides a firm interlocking of the two sections I and 2, assisted, advantageously, by the guiding action of the channel S and l.

Customarily baking pans are made of extremely thin sheet metal and where, as here, such pan is made of two sections it is necessary not only to provide locking means but also stabilizing means. In the instant case the locking means simultaneously serve as stabilizing means.

The operation of the device of the invention is self-evident from the description and illustration. In the most compressed position, i. e. when the sections I and 2 are in the most telescoped position, for the smallest size cake, the ridges 4, 4' and II" are interlocked with their corresponding ridges 5 (and tand 5", not shown), whereas in the most extended position, for the largest size cake ridge i would be interlocked with the outermost ridge (5) of the other section. In short, in the embodiment shown, the pan is designed for three diiferent cake sizes, depending on whether three or two of the buttons are, or only one of the buttons is, in operational contact. In each case, especially in the most extended position, the assembly of the two sections is stabilized, apart from the stabilization aiforded by the overlap of the walls of such sections, by the beaded rims 3 and 3 and, further, by the interconnected bottom channels S and?, serving also as rail guides. The localized friction areas, represented by the buttons formed by the ridges i and 5, also serve as abutments and indicators to the user of the particular size to which the pan has been extended or contracted. Normally the smallest size of such a baking pan will be that of a square shape, lthe larger sizes being of oblong shape.

In Figs. 5-10 I have illustrated another embodiment of the invention, in the form of a circular pan for baking such cakes as, e. g. angelcakes.

Fig. 5 merely shows a cylindrical sidewall 8 fabricated from a suitable length of sheet metal. The cylindrical wall is designed to overlap at one end, e. g. and S overlapping the other end I0 on the inside thereof. The upper rim is curled over or beaded, as shown at II illustrated in more detail in Fig. 6, in a manner similar to the beaded rim of the embodiment of Fig. 1. The beaded rim toward the ends, 9 and I0, differs slightly so that one rim fits tightly into the other, usually, as shown, the rim at the end I0 fitting into the rim at the end 9, i. e. the rim of the encompassed end 9 fitting over the rim of the encompassing end ID of the wall 8. As in the embodiment of 4 Fig. 1, the telescoping rims are in rm frictional contact. Also, the rim extends along the upper edge of the wall. The rim I I is at its outer part, i. e. the part into which the rim of the end i0 is fitted, notched at I2, I2' and I2", for purposes more fully explained hereinafter. The lower edge of the wall 8 is slightly flanged inwardly as shown at I9. Fig. 7 shows the bottom section I3 of the pan. It is provided with a series (three as shown) annular ribs I4, M and lli. Since this embodiment is illustrated in the form of a pan for angel cake, the bottom also contains an upwardly projecting conical center post I5 and depressions I6. In other types of baking pans such center post and depressions may, of course, be omitted and the bottom plate may be smooth and continuous, as shown in Fig. 7a. The depressions IB also serve as rigidifying means. As shown more clearly in Figs. S and 9, the annular ribs I4, I4 and i4" are provided with an undercut I8 forming an annular groove or channel, designed to receive the slightly hanged lower edge Is of the wall 8. In the drawings I have shown one particularly desirable type of ridge formed by creating a looplike fold in the bottom plate, but, of course, other forms of ridges with an under-cut may be used.

The loop-like ridge is preferred due to the ease with which it can be manufactured. The looplike ridge is like a wrinkle in the bottom plate. Due to the pressure of the frictionally telescoped rim II, the flanged lower end IS of the wall 8 engages the annular ribs I4 in like frictional contact along the undercut groove I 8. Each such rib It and the flange I9 thus form a localized friction area. The ribs I, It and Ill thus serve in the nature of an abutment controlling the size of the baking pan.

In the operation of the cylindrical embodiment of my invention, as shown in Figs. 5 9, the sidewall S is placed in position along either ridge Id or le or I 4", depending on the size of the cake to be baked, positioning along ridge I4 affording the largest size and positioning along ridge Iii" alfording the smallest size. In each case the inwardly flanged lower edge I9 rests within the outer annular undercut groove I8.

In many cases, the firm frictional t of the wall within the groove I8 is sufficient, in combination with the telescoping of the upper rim II, to provide a firmly interlocked cake pan. However, in other cases it is necessary to provide additional locking means. Such locking means are illustrated in Fig. 10 and serve to supplement Isl'ie pressure of the frictionally telescoping rim Referring to Fig. 10, I have shown a latch comprising a wire 29, e. g. steel wire, or rod secured within a hinge 2| having a passage 22 within which the wire is movably, i. e. rotatably, positioned. The hinge may be riveted, or otherwise fastened, to the wall 8 at the outwardly overlapping end I G. The rivets are indicated at 23. The steel wire 2G has an upwardly projecting parts, e. g. in the form of a loop 2li, and terminal ends 25. The latch, further comprises wire 2S looped over the ends 25 of the wire 2Il. One end of the wire 26 is formed as a handle 21 and the other end, 28, may be secured in a flat plate 29 having a passage 30 within which it is rotatably arranged. The plate 29, is preferably secured, as e. g. by means of rivets 3I, to a separate plate I'I which overlies the wall II] and also travels at its upper and within the rim I I and at its lower end also, preferably, Within the undercut grooves I8.

vThe purpose and function of this latch is to lock the two ends, 9 and I8, of the sidewall 8 together in the desired position. This is accomplished by positioning the projection or key 24 within the notches or slots I2, I2 or I2" of the rim II. In Fig. the lock is shown in closed position at notch I2. Notches I2, I2 and I2 on the rim I I correspond, relative to the key or stud 24,110 a position of the sidewall in juxtaposition to the undercut grooves I8 of ridges III, I8' and I9, respectively. Thus the position of the lock in Fig. 10 shows the sidewall 8 in juxtaposition against ridge I4, i. e. the largest size of the pan shown. By way of further illustration, if the wall 8 were positioned in conjunction with ridge I8 the key 24 would be located in mating notch I2', and so forth.

Thus, in the embodiment, the two sections, sidewall 8 and bottom plate I3 are secured together by means of the pressure exerted on the sidewall 8 by the latch key 28 against the undercut annular ridges I, I8 and I4". Where the friction of the telescoping rim II is sufficiently strong to provide the necessary pressure to securely force the flanged end I9 of the rim 8 into the groove I8 of the ridges III, etc., and keep it there, the latch may be omitted, but generally it is advantageous and also necessary to provide the supplemental pressure exerted by the latch.

In order to open the lock, it is only necessary to lift the handle 21, whereupon the wire 28, hinged within the passage 38, will lift the key 24 of wire 20, hinged in the passage 22, out of the notch 24.

I have thus provided a baking pan in which the two sections are tted together and held together by cooperating interlocking means comprising a telescoping rim and friction means at the bottom. In the embodiment of Figs. 1-4 the bottom friction means consist of the localized ridges a and 5 and in the embodiment of Figs. 5-9 the bottom friction means consist of the ridge I8 and the flanged end I9, supplemented by the pressure exerted through the key 24 of the latch of Fig. 10 designed to increase, where necessary, the locking pressure of the telescoping rim II.

'Ihe operation of the extensible baking pan of the invention is easy and simple. 'Ihe sections of the pan are easily manufactured and the parts are easily assembled, without extraneous holding means such as loops, rings, etc.

Adjustable extensible baking pans have the further advantage that it is possible to disassemble the pan prior to removal of the cake. After such disassembly it is far easier to remove the cake without damage than is possible in the case of fixed baking pans Where the cake must be removed from the pan, rather than, as in the case of extensible pans, removing the pan from the cake.

The parts or sections of my extensible, size adjustable, baking pan are thus held together by means of frictional engagement of the upper rim and by frictional bottom contact controlled by the friction pressure of the rim.

The pans and their parts are manufactured from suitable material, e. g. aluminum, tin, copper, and so forth.

It will be understood that various modifications of the invention as illustrated are possible, so long as the characteristic bottom friction area and rim frictional engagement are provided for. For instance in the drawings I have illustrated the undercut I8, designed to seat the flange I9, as an outside peripheral undercut of the ridge I4, I4 and I4, whereas in certain cases the undercut I8 could also be an inside undercuti. e. opposite to that illustrated-with the flange I 9 being seated in such inside undercut, pressure being asserted by the inherently outward pressure of the resilient wall 8.

What I claim is:

1. An annular extensible baking pan comprising an extensible split cylindrical wall and a bottom plate, said extensible wall being provided at its upper end with a telescoping rim and at its lower end with an inwardly extending ange. said upper rim having on one side of said split a plurality of spaced receiving members at spaced intervals, a lock member secured to said wall on the other side of said split, said lock member being engageable with said receiving members; said bottom plate being provided with a plurality of concentric annular ridges with an outer undercut groove, said flange of said wall being adapted to be seated in any of said undercut grooves, the pressure of the frictional contact of the telescoping rim maintaining said flange in one of said grooves.

2. An annular extensible baking pan comprising an extensible split cylindrical wall and a bottom plate, said extensible wall being provided at its upper end with a telescoping rim and at its lower end with an inwardly extending flange, said wall having on one side of said split a plurality of spaced receiving members at spaced intervals, a lock member secured to said wall on the other side of said split, said lock member being engageable with said receiving members, said bottom plate being provided with a plurality of concentric annular ridges with an outer undercut groove, said ange of said wall being adapted to be seated in any of said undercut grooves, the pressure of the telescoping rim maintaining said flange in one of said grooves, and the said receiving members being spaced relative to the concentric spacing of said plurality of annular ridges.

MANFRED DANZIGER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATESJPATENTS Number Name Date 632,505 Williamson Sept. 5, 1899 709,150 Halls Sept. 16, 1902 986,848 Nelson Mar. l14, 1911 1,827,396 Lucket Oct. 13, 1931 1,858,179 Bay May 10, 1932 2,020,373 Petzold Nov. 12, 1935 FOREIGN PATENTS Number Country Date 9,059 Great Britain Dec. 5, 1912 82,707 Switzerland Oct. 16, 1919 196,811 Great Britain May 3, 1923 

